If hikers are recommended to drink 24 ounces of water per hour, it means they should be drinking 24/60 = <<24/60=0.4>>0.4 ounces of water per minute.
As there are 10 minutes in a 10-minute interval, the amount of water in the canteen should change by 0.4 * 10 = <<0.4*10=4>>4 ounces. Answer: \boxed{4}.
It is recommended that hikers drink 24 ounces of water and hour. If a canteen has 24 ounces of water, how much should the amount of water in the canteen change every 10 minutes
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